Artificial turf and fake grass can be installled and seamed together by using adhesive placed on turf seam tape. Seaming artificial turf is performed as a "cold seam"; unlike carpet where an iron is used to activate the adhesive.
Synthetic turf glues are sold in 5 gallon buckets and cover between 160 - 175 sq. ft. typically; which is 165-175 linear feet of seaming material.
Please read the description and recommended usage for each turf glue product.